124. HTPSIKHINA. 3 



Maxillary teeth 10 to 16, followed, after an interspace, by a pair 

 ■of enlarged, grooved teeth; anterior mandibular teeth longest. 

 Head small, not or but slightly distinct from neck ; eye small, with 

 round or vertically elliptic pupil; head-shields large; nasals in 

 contact behind the rostral, semidivided, the cleft extending from 

 the nostril to the first labial or the loreal; internasal single or 

 divided ; loreal present. Body cylindrical ; scales smooth, without 

 pits, in 19 to 31 rows ; ventrals rounded. Tail moderate or short ; 

 subcaudals in two rows. 



South-eastern Asia, Papuasia, Iforthern Queensland. 



Synopsis of the Species. 



I. Eye in contact with one, two, or three labials. 



A. Scales in 19 rows. 



Two internasals ; ventrals 173-175 1. inclica, p. 4. 



Two internasals ; v^trals 125-152 2. alternans, p. 4. 



A single internasal ; ventrals 120-134 . . 3. plumhea, p. 5. 



B. Scales in 21 or 23 rows. 



1. Four or five lower labials (on each side) in contact with the 

 anterior chin-shields ; only the fourth upper labial entering 

 the eye. 



a. Loreal in contact with the internasal ; scales in 21 (rarely 

 23) rows. 



Tentrals 120-128 ; subcaudals 54—66 .... 4. jagorii, p. 6. 

 Yentrals 150-177 : subcaudals Al-ldi .... 5. enhydns, p. 6. 



6. Loreal not reaching the internasal. 



Scales in 21 rows ; ventrals 158-163 ; sub- 

 caudals 47-53 6. henneiti, p. 8. 



Scales in 23 rows ; ventrals 143-151 ; sub- 

 caudals 40-49 7. cJiinensis, p. 8. 



2, Three lower labials in contact with the anterior chin- 

 shields. 



Fourth and fifth or fourth, fifth, and sixth 



labials entering the eye ; ventrals 147- 



152 8. madeayi, p. 9. 



Fifth or fifth and sixth labials entering the 



eye ; ventrals 137-146 9. polylepis, p. 9. 



C. Scales in 25 to 33 rows. 



1. A single internasal ; ventrals 125-130. 

 Scales in 25 rows ; internasal nearly as 



long as broad 10. htanfordii, p. 10. 



Scales in 27 rows ; internasal about twice 



its broad as long 11. hocourtii, p. 10. 



b2 



